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To (The Preposition)
"To" Is a Preposition
When "to" is used in expressions like "to the park," "to the postman," and "agree to a proposal," it is a preposition.Usually, you can replace "to" with "for" or "toward," both of which are also prepositions. For example:
- I wrote a letter to Santa Claus.
- She went to the shops.

More about "To" As a Preposition
Using "to" as a preposition is extremely common. Using "too" as a preposition is a serious grammar mistake. The word "to" has two uses. The one covered on this page is its use as a preposition.This infographic summarizes the different uses of "to" and "too":

More Examples of "To" as a Preposition
- Alan gave the box to me.
- Please return the slips to the secretary.
- I must say I find television very educational. The minute somebody turns it on, I go to the library and read a good book.
(Comedian Groucho Marx)
- They should send all of them too the moon.
- Is that the diamond you gave too your cousin?
"To" Is Not Always a Preposition
The word "to" is also used as the sign of the infinitive. This means it appears before a verb to show the verb is in its basic form. For example:- I want to run.
- It is important to think. (In these examples, the word "to" is not a preposition.)
- I refuse to join any club that would have me as a member. (Groucho Marx) (Here, "to" is not a preposition.)
- Next time I see you, remind me not to talk to you. (Groucho Marx) (Here, the first "to" marks an infinitive verb, but the second one is a preposition.)
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